resizing movie clips

[DuMan]

Is there a way I can get a movieclip from the library, edit it, and replace it with the new version in the library? And without making a new movieclip that has the old movie clip within it?

[RoyalW]

In the library, double click the mc icon (not the name, this would rename it)
It will "update" whatever changes you make upon it.

Another way, if the movie is already on the stage, you can right click it and either press "Edit" or "Edit in Place"
The differnces are self explanitory